/*
 * @lc app=leetcode.cn id=17 lang=cpp
 *
 * [17] 电话号码的字母组合
 */

// @lc code=start
class Solution {
public:
    vector<string> letterCombinations(string digits) {
        if (digits.size() == 0)
        {
            return {};
        }
        unordered_map<char, string> phoneMap{
            {'2', "abc"},
            {'3', "def"},
            {'4', "ghi"},
            {'5', "jkl"},
            {'6', "mno"},
            {'7', "pqrs"},
            {'8', "tuv"},
            {'9', "wxyz"}
        };
        for(char c : digits)
        {
            
        }
        
    }
};
// @lc code=end

